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Post and Infix expressions in Java

Hello,

so I am 2 classes:

1) Infix-expression: I have 2 methods (toString and Evaluate) and I have wrote and tested both methods. However, you will need to write :

1.1) IllegalArgumentsExceptions in the constructor to handle the case of an illegal string examples : " 3 5 +++", "hello", "4 5 6 3 2". A correct input can be "4 9 /", "4 8 3 + /", " a b +". We don't have to handle parenthesis here.

1.2) Another exception in the Evaluate method because for that method we can not evaluate string that contain letters such as " a b +" since we don't know the value of a and b (but it's correct for the constructor). So it's the same logic as the constructor but without letters/variables names.

2) Post-fix expression: I haven't implemented anything yet but:

- The logic is different

- We have to handle "(" and ")"

- There is priority ""+/-" '/ and *".

- The methods are the same but we also need to have a method to convert a post-fix to an infix expression

Skills: Java

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